Bi-YIG nanoparticle and plastic hybridized magnetooptical material

We developed a new magnetooptical Bi/sub 1.8/Y/sub 1.2/Fe/sub 5/O/sub 12/ nanoparticle hybridized material which was composed of Bi/sub 1.8/Y/sub 1.2/Fe/sub 5/O/sub 12/ nanoparticles and a methylmethacrylate matrix, with and without polymethylmethacrylate. The Bi/sub 1.8/Y/sub 1.2/Fe/sub 5/O/sub 12/ nanoparticles were prepared using coprecipitation and annealing processes. The hybridized system was prepared by mechanical milling. In this system, polymethylmethacrylate was a very important functional material as a dispersant. Without polymethylmethacrylate, the Bi/sub 1.8/Y/sub 1.2/Fe/sub 5/O/sub 12/ nanoparticles aggregated. The magnetooptical properties of the solidified clear materials were measured.